The Litter Robot integration, written by Nate Spencer for SmartThings and ported by Dominick Meglio (@dman2306) to Hubitat, only works for the LR3, which I have. The API for the LR4 is very different. Neither API is published, and everything has been reverse engineered.
Dominic Meglio has left Hubitat for Home Assistant, and Nate Spencer left SmartThings for Home Assistant, too. Nate Spencer has developed an automation for Home Assistant that supports LR3, LR4, and the other LR product, the Feeder Robot. That automation seems to be undergoing continual change and development.
I spoke with Tom Denton, the Director of Software Engineering, a year ago, and he seems like a nice guy, very bright. He had just joined Litter Robot (now, Whisker) a few months before I spoke to him. The original API and mobile app for the LR3 was written by outside contract programmers, and is the API (“Legacy API”) that the Hubitat integration uses. Tom Denton assured me that the Legacy API will not go away even though the older mobile app has been removed from the Google and Apple app stores. A new mobile app was developed, using a Google Firebase API, but that API was scrapped when Tom Denton took over and brought all programming in-house. A new, extensible, API was developed for the new mobile app that supports LR3, LR4, the Feeder Robot, and other products. Nate Spencer’s Home Assistant automation, written in Python, uses this new (still unpublished) API.
If/when Nate Spencer’s Home Assistant automation stabilizes, or if the new Whisker API becomes published, I may port that to Hubitat. I have a LR3, and Dominic Meglio’s port has been rock solid for me.
Until then, if you want to integrate the LR4 with Hubitat, you should spin up a Home Assistant instance on a Raspberry Pi and use the community HADB to bring it into Hubitat.
